Plant support



FIG. 1 is a top left perspective view of a plant support;

FIG. 2 is a front elevation view thereof, the rear elevation view being identical thereto;

FIG. 3 is a left side elevation view thereof, the right side elevation view being identical thereto;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a plant support, as shown and described. 